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    1,4,6-oxadiazocines
    2.
    发明授权
    1,4,6-oxadiazocines 失效
    1,4,6-OXADIAZOCINES

    公开(公告)号：US3609144A

    公开(公告)日：1971-09-28

    申请号：US3609144D

    申请日：1968-06-20

    Applicant: ESCAMBIA CHEM CORP

    Inventor： HEIN RICHARD W

    IPC: C07D273/02 ,  D06M13/35 ,  C07D87/54

    CPC classification number: D06M13/35 ,  C07D273/02 ,  G05B2219/34043 ,  G05B2219/35384 ,  G05B2219/36573 ,  G05B2219/50291 ,  G05B2219/50295

    Abstract: Production of the novel compounds 4H,6H-3,3,8,8-tetramethyl2,5,7 trioxo-1,4,6-oxadiazocine, halogen derivatives thereof, and 4H,6H-3,3,8,8-tetramethyl-2,7-dioxo-5-thio-1,4,6-oxadiazocine. The compounds 4H,6H-3,3,8,8-tetramethyl-2,5,7, trioxo-1,4,6oxadiazocine and 4H,6H-3,3,8,8-tetramethyl-2,7-dioxo-5-thio1,4,6-oxadiazocine are both useful as crease resistant agents for cloth and are believed to have worthwhile sedative and hypnotic properties whereas the N,N-dihalo derivatives of 4H,6H-3,3,8,8tetramethyl-2,5,7 trioxo-1,4,6-oxadiazocine are useful as bactericides.

    Process for producing methacrylic acid
    3.
    发明授权
    Process for producing methacrylic acid 失效

    公开(公告)号：US3562320A

    公开(公告)日：1971-02-09

    申请号：US3562320D

    申请日：1967-04-25

    Applicant: ESCAMBIA CHEM CORP

    Inventor： WOODWARD GEORGE E ,  HEIN RICHARD W

    IPC: C07C51/377 ,  C07C57/04

    CPC classification number: C07C51/377 ,  C07C57/04

    Abstract: METHACRYLIC ACID IS PRODUCED BY DEHYDRATING ALPHA-HYDROXYISOBUTYRIC ACID IN THE LIQUID PHASE UNDER THE INFLUENCE OF HEAT AND A CATALYST WHICH IS A METAL SALT OF ALPHA-HYDROXYISOBUTYRIC ACID. THE PROCESS IS DESIRABLY CARRIED OUT AT A TEMPERATURE IN EXCESS OF ABOUT 180*C., WHILE MAINTAINING THE ALPHA-HYDROXYISOBUTYRIC ACID IN THE LIQUID STATE. THE METAL SALT OF ALPHA-HYDROXYISOBUTYRIC ACID IS OBTAINED BY REACTING THE ACID WITH A METAL HYDROXIDE OR METAL SALT WHICH WILL REACT WITH THE ALPHA-HYDROXYISOBUTYRIC ACID TO PRODUCE THE CORRESPONDING METAL SALT OF THE ACID. DESIRABLY, THE PORCESS IS CARRIED OUT IN THE PRESENCE OF A POLYMERIZATION INHIBITOR FOR THE METHACRYLIC ACID WHICH IS FORMED DURING THE PROCESS.

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